package mian;

public class Student {
    private String id;
    private String name;
    private int age;

    // 构造方法、getter和setter
    public Student() {}

    public Student(String id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    // getter和setter方法
    // toString方法
}
